AWS EFS link to ECS

Question

Hi All,

I created POC with EFS as temporary storage for my ECS Cluster. I'm using Fargate, and already setup EFS link on my ECS Task Definition.

![Enter image description here](/media/postImages/original/IMBWPsP5k2TRCSNa6rYtfoIQ)

When I tried it, seems like it's failed because write permission denied.

Is there any official article about how to link EFS to ECS? Article that I saw is to link EFS to EC2 that using Amazon Linux 2 image.

Thank You.

Answer

This AWS Blog is also a good reference. 
https://aws.amazon.com/blogs/containers/developers-guide-to-using-amazon-efs-with-amazon-ecs-and-aws-fargate-part-2/#:%7E:text=POSIX%20permissions

Answer

Make sure that you have set up the correct IAM permissions for your ECS tasks to access the EFS file system. You should have a policy that allows your ECS tasks to perform actions such as **elasticfilesystem:ClientMount** and **elasticfilesystem:ClientWrite**.

Secondly, you should ensure that your task definition is set up correctly to use EFS. This means including the **efsVolumeConfiguration** section in your task definition with the correct mount point and file system ID.

Or you can giving your ECS tasks superuser privileges, That might be a quick way to get around the issue.

AWS EFS link to ECS

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